PHP基础学习代码案例

<?php
print  'hello world ! ';
echo '<br/>';
?>
<?php
$number="16";
$number2="12";
//use dot to link str
echo $number.$number2;
?>
<?php
echo '<br/>';
echo strlen('Hello World !');
echo '<br/>';
echo strpos('Hello World !','o')
?>
<?php
echo '<br/>';
$d=date("D");
if($d=="Fri")
{
	echo 'Hello<br/>';
	echo 'Have a nice day!';
}
else
{
	echo 'Today is '.$d.'<br/>';
}
?>
<?php
switch($d)
{
case 'Wed':
	echo 'Have a nice day !';
    break;
default:
	echo 'Today is '.$d;
}
?>